Voyager 2 is the only spacecraft to have visited Uranus and Neptune, and the second, after Voyager 1, to cross the heliopause into interstellar space.
About Voyager 2
Despite its name, Voyager 2 launched first, a little ahead of Voyager 1. A rare alignment of the outer planets let it fly past Jupiter, Saturn, Uranus and Neptune in turn, each planet’s gravity bending its path towards the next. Its views of Uranus and Neptune remain the only close-up ones ever taken.
At Neptune it found the Great Dark Spot, a storm in the planet’s atmosphere, and photographed plumes rising from the surface of Triton. It later crossed the heliopause heading south of the plane of the planets, so it can be commanded only from the southern dish of NASA’s Deep Space Network, in Australia.
What you see in the piece
Shown at its current position, beyond the heliopause and diverging from the path of Voyager 1. Like Voyager 1 it is far too small to see.
Questions
Which planets did Voyager 2 visit?
Jupiter, Saturn, Uranus and Neptune. It is the only spacecraft to have visited the last two.
Is Voyager 2 still working?
Yes, though its power is slowly declining and instruments are being switched off to keep it going.